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Publication numberUS2655092 A
Publication typeGrant
Publication dateOct 13, 1953
Filing dateFeb 15, 1951
Priority dateFeb 15, 1951
Publication numberUS 2655092 A, US 2655092A, US-A-2655092, US2655092 A, US2655092A
InventorsSpooner Richard C
Original AssigneeA R Lintern Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Vehicle heater and system
US 2655092 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Oct. 13, 1953 R. c. SPOONER VEHICLE HEATER AND SYSTEM Filed Feb. l5, 1951 Irs Patented Oct. 13, 1953 VEHICLE HEATER AND SYSTEM Richard C. Spooner, Cleveland, Ohio, assignor to A. R. Lintern Inc., a corporation of Michigan Application February 15, 1951, Serial N o. 211,037


This invention relates to vehicle space heaters and in particular to a primarily fresh-air heater capable of recirculating interior air and mixing the fresh and recirculated air and this application is a continuation in part of my co-pending application Serial Number 155,081.

The heater unit is particularly adaptable for use in conjunction with buses using a standard front-engine truck-chassis on which a bus body is mounted to the rear of the engine. In this type bus the body interts with the chassis cowl and expands from the cowl to the full dimension of the body. The steering wheel and driver controls are immediately back of the cowl leaving a triangular space in the body to the left of the driver area. Such buses are employed by schools and are herein referred to as school buses for purposes of description and explanation.

In a school bus, the drivers seat and vehicle controls are located in the left front of the bus and an edit and exit door at the right front of the bus so that the driver can control the entry and leaving of passengers, collect fares, etc. The step well, fare box, and passenger aisle occupy the right front and center of the bus and the driver, drivers seat, and vehicle controls occupy the left front side of the bus so that the only available clear unused front floor area of this type bus is to the left of the driver adjacent the side Wall, and, due to the body contour, this space is usually triangular.

To heat the front end of such a bus satisfactorily, all areas must be furnished with heated air including the step-Well, aisle, driver, front passengers, and windshield for defrosting. Obviously, these demands upon a heater located to the left of the driver are divergent and even diametrically opposed in that the heat must be furnished fore, aft, up, and sideways. These demands are great considering the space limitation on the heating equipment and the available isolated space in which a floor heater may be placed.

It is, therefore, a primary object of the invention to provide a school bus fresh-air, recirculated-air heater which will fit in the confined space between the driver and the wall which is capable of furnishing heated air forwardly to the drivers feet and the fore part of the bus, sidewardly to heat the door and step-well area. rearwardly to heat the front passenger area, and upwardly to defrost the Windshield.

An object of the invention is to provide a fresh air intake for the heating unit and a recirculated air intake for the unit which cooperate with each other to insure an adequate supply of heated air 2 to the bus interior regardless of wind and other atmospheric conditions adversely affecting the supply of fresh air.

An object of the invention is to furnish a bus heater having a single heating core in conjunction with multiple fans angularly disposed thereto adapted to direct heated air in diverse directions.

An object of the invention is to provide a windshield defroster blower in conjunction with said fans and core to furnish heated air in a direction diverse to said fans to the windshield area of the bus to defrost same.

An object of the invention is to provide means for optionally dividing the heating area of the core between the fans.

An object of the invention is to provide means for directing all the heated air from one fan to the defroster blower, a mixture of heated and unheated air to the defroster blower, or unheated air only to the defroster blower.

An object of the invention is to provide means to furnish the entire heated air output of one fan to either the defroster blower, the drivers area, or the step-well and door area.

An object of the invention is to provide means for optionally powering the fans and defroster blower so that heated air can be circulated by one only or by any combination thereof and to provide vent doors in conjunction therewith to optionally direct heated air to the blower, driver area, front door area, any combination thereof or any one individually.

An object of the invention is to provide a heated air accumulation chamber housing the defroster blower so that a copious amount of heated air under pressure is optionally made available to the defroster to adequately supply the defroster system with a quantity of fresh air sucient to accomplish defrosting under even the most adverse condition.

An object of the invention is to provide a hot Water control valve adjacent the driver for regulating or stopping the flow of heating medium in the core.

An object of the invention is to provide a compact, economical, single core, multiple blower unit having all controls at the drivers finger tips and which is easily installable and accessible for servicing.

These and other objects of the invention will become apparent by reference to the following description of a bus heater embodying the invention taken in connection with the accompanying drawing, in which:

Fig. 1 is a plan View of the inventive heater Referring now to the drawing wherein like numerals refer to like and corresponding parts f throughout the several views, VVthe fresh-air" school bus-heater and defroster system disclosed y,

therein to illustrate the invention comprises a substantially triangular heater shell l5 disposed in the left front of the bus body Ii in the area of the body Il between the drivers seat i2 andthe bus body inside wall i4 Fig. 1, which area is usually triangular as shown in more or less degree, and wherein it is vto be noted that the angularly disposed!V front face'k l5 and the relatively shorter angularly disposed rear face IS of the heater shell I9 facilitate directing' air in the desired areas.

More particularly, "the inventive heater comprises the shell l5, the angled faces i5 and end portions il and I8, an'open back i9, a botn tom 20, a top 2|, a single flat heater core 22 adn jacent 'the back i5 spaced from the front end wall il,hose connections 23 and 24 connecting the vehicle motor cooling system to the core 22, a divider '25 leading`- from the obtuse junction 25 of the angled faces i5 andy 'i6 to the core 22 dividing the core 'area substantially'equally, a front fan shroud 2'! disposed between the junction 2S and the front end 28 of lthe core 22, a like rear fan shroud 21 disposed between the junction 25 and the rear end'29 of the core 22; the shrouds 21 being angularly disposed to both the adjacent faces I5 and i6, to the divider 25, and to the core 22; fan motor supports 3e mounted on the shrouds 21,'fan motors 3i mounted on the supports`35, fans 32A and 32B mounted on the mo tors 3U' adapted to rotate inthe opening 33 of the shrouds' 2, adefroster blower 34 disposed in the space between the end 28 of the core 22 and the front end it of the shell l2, a duct 35 rising from the blower 34 to a point adjacent thebottom of the bus side window and windshield, not shown,`a manually rotatable head 36 on the duct 35, a hinged deiectory door 3,1 on the top lof the head 35, a side outlet coupling 38 in theduct 35, a defroster duct 39 leading from the duct 35 out# let coupling'38, a'deroSter air vent slot 46 in duct 39, a forwardly opening door 4| in the front I5, atleast onerearwardly opening door 42 in the front i5',v louvered vents'43 in the front l5 and end' I8, and'louvered recirculated air-intake vents44 in the top 2i leading to the top of the corey 22. Separate individually operated switches, not shown, are mounted on the shell lil Vforcontrollingithe electricalrpower circuits to the motors powering the fansv 32A, 32B, "and the blower 34 so that any one fan or blower `in v dividually orlin any combination` may be driven to furnish heated airas desired.` l

Thebody.l outsidewall MB is 4,equipped with fresh-air scooping louvers 5D which take in fresh-4 air and'deliversame'to the space 5i between the bus body walls MA and I4B which actsV as a chan-v nel for the fresh air Yto the back 'of the heater shell i which is positioned over an aperture in the inside wan ma." The fresh air enters the' louvers'ftr'avels in the space 5l between the walls 111A and MB tothe aperture in the inside wall 14A, and thence through the aperture into the rear of the heater shell l and through the core 22 where it is heated and delivered to the interior of the bus.

The inside or bus interior air intake louvers 44 communicate with the relatively small tcp or edge of the core 22 whereas the outside of fresh air louvers 5)` communicate with `the relatively large full face ar'ea of thefcore 22. The louvers 44 and 5i] are so related that when the outside louvers 59 are delivering a normal supply of fresh air, thefresh air at the face of the core 22 is under pressure and the fans 32A and 32B draw only fresh air. Conversely, when the outside louvers 50 arle delivering less than a normal supply of fresh air, thefans 32A and 32B draw air via both the o'u'tside"louvers 5G and the inside louvers 44.

YIn this way, a full volume of heated air can al- Ways be delivered by the fan 32A and 32B. In the event no air is furnished bythe outside luovers 50, the fans I,32A 'and 32Bv can draw interior air via the louvers, t

An'optionalair supply to the core 22 from the louversj'tfi andy 513y is ,automatic and entirely dependent on air conditions affecting the outside louvers ilysuch aswind direction and velocity, snow,sleet',"etc. ',Anexample, of one of the many possible 4air conditions 'l affecting delivery by the louversuisa tail wind greater than the speedv of the busfMAn'other condition isA a right front vwind ,so angling across the louvers 59 that a static, boundary layer or low pressure area is developed in the area ofthe louvers 5G. These conditions can aiect the air delivery ofv the louvers 5 9 partially or completely and the amount of air; then delivered by the vinside louvers 44 will automaticallyY counter the adverse affects. Nrmally, `of courseflthe outside louvers 5v5 deliver air underipre'ssure'to the core ,:2 so that no air is passed through the inside louvers d to vthe core 22.' In 'the'event `airisfforced out of the louvers 44 into thefinterioriof the bus', the area to the left of theldriverissupplied with heated air.

The area ofthe heater" i8v on the delivery side of the Ycore 22 is dividedli'nto triai'figulai cham` bers C D, F, and Glas' defined by the face of vthe core 22, the fronts I 5`fand i5, the divider 25, and the fanvshroudspZ'i in conjunction with the fans 32A and 32B.' Triangular chambers Dy and F behind the fans'32A and 32B permit the fans' to pull air through the core 22 as channeled by thel divider25fso that air flows substantially uniformly throughI ,thefcore 22 'substantially devoid'of fan influences Fso thatY the core'is uniformly u`ti lized. e The fans 32`Aland 32B deliver the air into thechambers C and D respectively' where fan directional influence'is 'substantially dissipated.` The doors'l and 42flibe'rate` air from the cham-A ber Cv and th'elouvers "i3v liberate air from thev chamber G which ventsexercis'e a directional iniiuenc'eon theI air passing therethrough to direct the airY as desired in the bus interior. The 'charnbers C, D, F, and G constitute plenums and effect' an even air owfthrough the core and permit desireddirection ofthe air into the bus interior, It has been found that the spacing of the fans from the core `and from` the triangulated faces of the" heater isfessenti'al if the desire'diresults are to be obtained, ifelft'o be able tov direct 'air to anyportion ofthefront endof the bus at the option of theyy 'driver so thatfhe can 'adjust the device` to ,o'verco'ine` the Vvarying conditionsv encountered 'causedby varying wind direction, temperatures,speedand passerlgersv l' YVhenall 'the 'fanmdtorsfare running' and all` the heater vents are open, air through heater front i6 and end I8 is directed as described, and air through the front l5 is directed as described but the blower 34 draws air through the doorways MA so that a mixture of heated and unheated air is fed to the defroster duct 35. If the door 4l is the only door closed, then the blower 34 is fed only heated air and this diminishes the supply of heated air to the doorway 42A. If al1 of the doors are closed, then all the heated air furnished by the fan 32A adjacent the front l5 is fed to the blower 34 under presssure.

In use, the doors 4i and 42 may be closed so that all the air directed to the space or chamber C can be placed under pressure therein to feed the defroster blower 34 an excess amount of heated air. If the fan 32A is off, and the door 4I or one of the doors 42 is open, the blower 34 will then furnish unheated air to the defroster system and if the doors 4i and 42 are closed then the blower 34 will drag air through the core 22 so that heated air is supplied to the defroster system. When the blower 34 is off, no air is supplied to the defroster system and all the air forced by the fan 32A will be dilevered through the doors 4i and 42.

Air delivered to the duct 35 by the blower 34 is normally delivered via the coupling 38 to the defroster duct 39 where it is directed via the vents 4c against the windshield to defog and defrost same. In the event the windshield or drivers side window becomes foggedV or frosted in spite of a full volume of heated air being delivered by the fan 32A and the blower 34, the driver may open the door 37 in the rotatable head St on the duct 35 and so rotate the head and regulate the door 3l that he can direct a blast of air against any selected area of the windshield or side window to defrost that area quickly and efciently so that complete, clear vision is at all times insured the driver. This is an important part of the invention as a terrific blast of heated air is needed to defrost areas quickly and the rotatable head 36 and adjustable door 31 constitute an universal joint enabling the driver to direct the air blast at any point or area as supplied by the fan 32A and the blower 34 with the doors 4l and 42 closed.

Wind direction and velocity, outside temperature, inside temperature, number of passengers using air, speed of the bus, etc. are factors which affect the proper heating of the bus and the frosting and fogging of the windshield and drivers side window which varying conditions pose a constant varying problem which cannot be successfully overcome unless the heating and defrosting equipment is versatile and adaptable to the changing conditions.

Due to the fact that the heating unit supplies a large amount of heated air to the bus interior the atmospheric pressure of the bus interior is raised over the outside so that flow of air in all body cracks and crevices is outwardly directed thereby eliminating inward cold air leaks and drafts. Due to the fact that used air is being constantly liberated and fresh air constantly supplied the exhaled moisture of the passengers is passed out of the bus interior reducing the moisture content of the interior air thereby reducing the tendency of the windows to frost and fog. The system is suitable for all-weather use in that the hot water control valve can be regulated to supply the desired amount of heating medium for cold or medium days and may be shut off on warm or hot days and unheated fresh 6V air supplied, which is especially desirable on rainy days.

The instant invention provides a heater using a single core 22 which is capable of supplying suiiicient heat to heat and defrost in conjunction with the fans 32A and B set at an angle to the core22 and the deecting fronts I5 and l and the end I8 set at still a different angle to the .already angularly disposed fans and the disposition of the core, fans, and faces is considered critical to properly and satisfactorily distribute the heat to the desired areas of the bus front end and to the defroster system.

Although but a single embodiment of the invention has been shown and described in detail, it is obvious that many changes may be made in the size, shape, detail, and arrangements of the elements of the invention such as using doors in the rear face I6 instead of louvers within the scope of the appended claims.

I claim:

1. A -bus space heater positionable between the driver area and the body side wall comprising a core, a core enclosing shell including a back, a front end, a rear end, a front face obtusely angling from said front end, a relatively shorter rear face obtusely angling from said rear end; said faces obtusely joining with each other, a bottom, and a recirculated air intake vented top communicating with the top of said core; said core being disposed adjacent said back spaced from said front end, a blower disposed between said front end and said core exhausting through said top, a duct rising from said blower adapted to extend to a point adjacent the bottom of a bus windshield and side windows, a vented defroster duct leading from said duct adapted to parallel a bus windshield bottom and adapted to direct air against a windshield to defrost same, a rotatable head on said duct, a door in said head; said door and head constituting a universal joint adapted to permit the driver to direct air on any particular area of the windshield or side window to spot-blast same, a front fan angularly disposed to said front face and to said core, a rear fan angularly disposed to said rear face and to said core, a divider positioned -between said fans extending from the junction of said faces to said core separating said fans and dividing said core area between said fans, louvers in said rear face and said rear end for deilecting air to the right and left sides, rear, and center area of a bus, doors in said front face adapted'to optionally direct air to the step-well and front door area, driver area, front passenger area of the bus, and to said defroster blower singly or in combination, and a main fresh air intake in said back communicating with the full area of said core.

2. A bus heater adapted to fit between the body side wall and the driver area comprising a triangularly faced core enclosing shell. a core adjacent the back of said shell and spaced from the front end thereof, a blower disposed in the space between said core and the front end of said shell, a duct rising from said blower adapted to extend to a point substantially even with the bottom of a bus windshield and side window, a rotatable head on said duct, a door on the top of said head adapted to be open an adjustable amount constituting with said head a universal joint for directing a spot-blast of air on a selected area of a bus windshield and/or side window to quickly defrost same, a divider in said shell extending from the apex of the triangular face to substantially the; middle of said core, fans angu-u larly disposed to said core, divider,.:and shell face, louvers'A in the rear :portionof-.fsaid rfaceito directair to selected. areas: ofrabus, and doors in the front `portion of said .face for directing air to selected areas of said busi land todsaid blower, singly or in combination.

3. In a bus heater', a shell-,having an` airinle-t and a. V-shaped face portion .provided with Vair discharge openings, a core .disposed within said shell and spaced from said face portion,a divider extending from the apexl ofsaid face to substantially the middle of 4said core dividingfthe core area so that substantially half said core is adapted nto heat air flowing -therethrough feeding on either side ofsaid dividerand afan disposed on either side of said divider.- at an angle to said core and to -the adjacent portion of 4said V-shaped face `tofacilitatel directing air. in diverse directions.

4. A bus heater comprising a shell, a V-shaped face on said 'shell having afront portion and a rear Yportion,.louvers in the rear portion of said face adapted to direct air toward the right side, center, and left side' of a bus in the front passenger area thereof; doorsfin the front portion of said face adapted to vdirect `air toward the front of. abus such as vthe drivers feet, aisle, step-welLfand Vfrontvdoor areas, a-core in said heater adjacent the back ofY said shell, an air inlet in said shell communicatingwith said core, a divider extending from said core to ythe apex of said V-shaped face adapted to divide air coming through said core between the front and rear portions of .said face,fans.angularly disposed on either side of rSaid divider between said core Cil and said face fin-:angular relation 'to lsaid `core and ton said face'portion adjacent thereto'to facilitate. directing 'air to. the selected and desired areas of a bus via said louversand doors. .5. A bus heater comprising a substantially V-.- shapedI face having a forwardly facing portion.

fand a` rearwardly facing portion, a coresp'aced away from said face triangulating with said portions,. an air inlet means communicating with said core, a dividerextending from the apex of said :face to the middle of said core dividing lthe apex angle of said face, fans angularly disposed on either side ofv said divider in angular relation to said core and the adjacent portions of said face creating a substantially triangular plenum chamber between said core and said fans, be'- tween' said fans, 'said divider, and the adjacent portions lofv said face lto reduce the directional inuence of said fans on said core ito permit even flow therethrough and to reduce the directional influence of said fans on directional vents disposed in said face so that air will be directed: as desired via the directional vents in said face.


References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,859,482 Wines May 24, 1932 1,988,745 Nelson Jan. 22, 1935 2,010,808 Braine Aug. 13, 1935 2,295,750 Norris et al. Sept. 15, 1942 2,330,653 Wilson Sept. 28, 1943 2,562,088 Fisher et al July 24, 1951

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1859482 *Jan 24, 1930May 24, 1932Tropic Aire IncHeating apparatus for automotive vehicles
US1988745 *Jul 30, 1932Jan 22, 1935Herman Nelson CorpHeating and ventilating unit
US2010808 *Apr 1, 1933Aug 13, 1935Braine Daniel LAir conditioner
US2205750 *Jan 3, 1939Jun 25, 1940Russell W RossFuel system for engines
US2330653 *Jun 22, 1942Sep 28, 1943Wilson Engineering CorpUnit heater
US2562088 *Oct 8, 1948Jul 24, 1951Eaton Mfg CoHeater
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2746726 *Dec 18, 1953May 22, 1956Hoff Clarence ASpace heater for busses and the like
US2798366 *Apr 15, 1954Jul 9, 1957Refrigeration Appliances IncWidespread air circulating refrigerating unit
US3855450 *Oct 1, 1973Dec 17, 1974Vapor CorpLocomotive electric cab heater and defrosting unit
US5046554 *Feb 22, 1990Sep 10, 1991Calsonic International, Inc.Cooling module
US5476138 *Aug 25, 1993Dec 19, 1995Calsonic International, Inc.Motor vehicle with improved radiator and condenser mounting device
US5934988 *Jul 28, 1997Aug 10, 1999Fischer; Carl JohnMethod and apparatus for motor vehicle heating and air-conditioning
US6003593 *Oct 31, 1995Dec 21, 1999Denso International America, Inc.Automotive vehicle climate control system
US6196308Feb 16, 1999Mar 6, 2001Denso International America, Inc.Automotive vehicle climate control system
US6471137Apr 12, 2000Oct 29, 2002Thomas Built Buses, Inc.Externally accessible climate control system for passenger coaches
US6854794 *Mar 16, 2001Feb 15, 2005Magna Interior Systems, Inc.Cross car duct with integrated mode doors and HVAC module
US7219508 *Mar 22, 2005May 22, 2007Michael J. DurbinEvaporator assembly for cold tables and method for refrigerating cold tables
US9393973 *Mar 26, 2013Jul 19, 2016Kawasaki Jukogyo Kabushiki KaishaDual-structure storage box of railcar and railcar including same
US9511780 *Apr 10, 2013Dec 6, 2016Electro-Motive Diesel, Inc.Electrical enclosure for locomotive
US20040212211 *Mar 16, 2001Oct 28, 2004Beckley Daniel VCross car duct with integrated mode doors and hvac module
US20050204765 *Mar 22, 2005Sep 22, 2005Durbin Michael JEvaporator assembly for cold tables and method for refrigerating cold tables
US20140305333 *Apr 10, 2013Oct 16, 2014Electro-Motive Diesel, Inc.Electrical Enclosure For Locomotive
U.S. Classification454/93, 454/95, 454/108, 165/127, 454/112, 454/109, 237/12.30B, 454/124, 454/99, 237/45
International ClassificationB60H1/00
Cooperative ClassificationB60H1/00464
European ClassificationB60H1/00K1